Which is not true for combustion reactions? a. they produce carbon dioxide and water
b. a candle burning
c. they always occur in the presence of oxygen
d. they usually require a lot of energy to form products

Calculate the mass percent of hydrogen in methyl acetate

|using the periodic tablewarm-upuse the periodic table in the tools bar to answer the following questions.what elemental classification does oxygen belongto? done

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d